PB3700 - 700 Amp Circuit Breaker

PB3700 - 700 Amp Circuit Breaker

If you're replacing a breaker in an existing electrical system, getting the details right matters. The PB3700 is a 700A, 3-pole Type PB circuit breaker with a thermal-magnetic trip and rear-connected design. It's rated for 40°C and has interrupting ratings of 100k AIC at 600VAC, 100k AIC at 480VAC, and 125k AIC at 240VAC. The breaker measures 22.13 inches high, 12.06 inches wide, and 9.06 inches deep. Those specifications make the PB3700 a potential fit for existing and legacy equipment designed around this breaker type and configuration. When replacing an existing unit, check more than amperage alone. Pole count, dimensions, connection style, voltage, and AIC rating must all match the application. For systems that specifically call for a PB3700, this breaker provides the required thermal-magnetic functionality in a straightforward, heavy-duty design built to last when properly selected, installed, and maintained.

Key Features and Benefits

• 700A, 3-pole configuration for compatible electrical distribution systems.
• Thermal-magnetic trip provides overcurrent protection appropriate to the breaker's intended application.
• Rear-connected design for equipment built around this connection arrangement.
• 40°C rated for applications that match the specified operating conditions.
• 100k AIC at 600VAC and 480VAC, with a 125k AIC rating at 240VAC.
• Dimensions and configuration make it useful when matching an existing PB3700 or compatible Type PB installation.
• A straightforward choice for form, fit, and functional replacement in compatible legacy electrical equipment.
• Built to last when used within its specified ratings and properly maintained.

Technical Specifications

• Part Number: PB3700
• Type: PB
• Amperage: 700A
• Poles: 3
• Trip Type: Thermal Magnetic
• Connection: Rear Connected
• Temperature Rating: 40°C
• AIC @ 600VAC: 100k
• AIC @ 480VAC: 100k
• AIC @ 240VAC: 125k
• Height: 22.13 in.
• Width: 12.06 in.
• Depth: 9.06 in.

Material Compliance and Certifications

• The available PB3700 specifications did not include specific material compliance, certification, or listing information. Confirm any required certifications or compliance details using the breaker's markings and applicable product documentation before installation. This is particularly important when working with existing equipment that must meet specific facility requirements, electrical codes, or other applicable standards.

Where It Works Best

• The PB3700 700A circuit breaker is best suited to existing or legacy electrical systems designed for a 3-pole, rear-connected Type PB thermal magnetic breaker with the same electrical and physical requirements. It's especially useful for replacement and maintenance situations where the goal is to keep the original form, fit, and function.
  One thing to keep in mind: two breakers can look similar and still have important differences. Before using the PB3700 as a replacement, confirm the part number, amperage, pole count, voltage, AIC rating, dimensions, and rear connection arrangement against the existing equipment's requirements. A careful match is the simplest way to determine whether the PB3700 belongs in the application.